Add the octopus to the soy sauce to a medium-size bowl and set aside.
Mix the jicama, red onion, lime juice, salt, sugar and cayenne pepper in a bowl and set aside.
Heat a large pan on medium-high heat and add 2 tablespoons of olive oil. Heat another large pan on high heat and add the other 2 tablespoons of olive oil.
Remove the octopus from the soy sauce and add to one of the pans over medium-high heat. Cook for 2 minutes on each side. While the octopus is cooking, add the tortillas, 1 at a time, to the other large pan over high heat and fry until light golden.
Remove the cooked octopus from the pan to a cutting board and chop into coarse pieces. Put 1/4 of the octopus in each tortilla, top with 2 spoonfuls of the jicama mixture and sprinkle with cilantro. Arrange on serving plates and garnish with a couple of wedges of lime and cilantro sprigs.
I buy my octopus at the Asian food market but sometimes they don't have it, so as an alternative I have used a 1/2 pound of raw, peeled and deveined tiger prawns. All steps for the octopus are the same for the shrimp.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.